brake compass

[radio]

I happen sometimes to have to do sunflowers with candle cutters.
I have never been able to achieve them with them in a satisfactory way (with i-deas instead yes); the maximum I can do is as from attached file, but even if for me it can go, it is not geometrically correct (try to decrease in internal diam and you will see better).
can someone of you do something more correct and maybe even more elegantly, or the most you can do is prorpio this?
Hello, everyone.

 

[cacciatorino]

I happen sometimes to have to do sunflowers with candle cutters.
I have never been able to achieve them with them in a satisfactory way (with i-deas instead yes); the maximum I can do is as from attached file, but even if for me it can go, it is not geometrically correct (try to decrease in internal diam and you will see better).
can someone of you do something more correct and maybe even more elegantly, or the most you can do is prorpio this?
Hello, everyone.

This whole thing has been talked about in the swx forum, even there with the same problems.

the fact is that you should use a cutting function for envelope rather than extrusion along a path, in fact the volume "worked" by a cylinder that moves like our milling, is quite different from what is occupied by the rectangle that is the projection in plan of our milling. tend to coincide when the primitive ray of the envelope is very large compared to the diameter of the cutter, as you have already noticed.
then instead of as you did, perhaps it would be worth drawing a guide profile on the plane and then projecting it on the cylinder and extruding along the projected profile. I can't give you an example for license reasons.

I often design those pieces, and use the open sheet metal method, dug and then closed, but I have a very favorable diameter ratio.

However, in the end, I think it's only a problem of representation, as the piece is always listed on the 2d, so you'll put the correct quotation there.

 

[radio]

....
I often design those pieces, and use the open sheet metal method, dug and then closed, but I have a very favorable diameter ratio.

However, in the end, I think it's only a problem of representation, as the piece is always listed on the 2d, so you'll put the correct quotation there.

I also tried with sheet metal but the result is worse than what I can get with the method used as from attached file, in practice starting-end milling profiles are significantly deformed.
also the sketch projection of the whole working on the cylinder face gives variable results from the modest to the bad, to also here depending on the relationships between the diameters, the thickness of the compass and the angle of projection.
n.b. I practically never read the forum swx and I did not know that the topic there had been repeatedly addressed.
Hello and thank you.